Annotation of loncom/homework/lonhomework.pm, revision 1.246
1.63 albertel 1: # The LearningOnline Network with CAPA
1.52 albertel 2: # The LON-CAPA Homework handler
1.63 albertel 3: #
1.246 ! albertel 4: # $Id: lonhomework.pm,v 1.245 2006/05/12 01:20:44 albertel Exp $
1.63 albertel 5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
1.159 www 27:
1.1 albertel 28:
29: package Apache::lonhomework;
30: use strict;
1.73 albertel 31: use Apache::style();
32: use Apache::lonxml();
1.204 albertel 33: use Apache::lonnet;
1.73 albertel 34: use Apache::lonplot();
35: use Apache::inputtags();
36: use Apache::structuretags();
37: use Apache::randomlabel();
38: use Apache::response();
39: use Apache::hint();
40: use Apache::outputtags();
1.83 albertel 41: use Apache::caparesponse();
42: use Apache::radiobuttonresponse();
43: use Apache::optionresponse();
44: use Apache::imageresponse();
45: use Apache::essayresponse();
46: use Apache::externalresponse();
1.106 albertel 47: use Apache::rankresponse();
1.107 albertel 48: use Apache::matchresponse();
1.137 albertel 49: use Apache::chemresponse();
1.169 albertel 50: use Apache::drawimage();
1.26 www 51: use Apache::Constants qw(:common);
1.73 albertel 52: use HTML::Entities();
1.83 albertel 53: use Apache::loncommon();
1.146 albertel 54: use Apache::lonlocal;
1.179 albertel 55: use Time::HiRes qw( gettimeofday tv_interval );
1.188 foxr 56: use Apache::lonnet();
57:
1.189 albertel 58: # FIXME - improve commenting
1.188 foxr 59:
1.43 albertel 60:
1.69 harris41 61: BEGIN {
1.145 albertel 62: &Apache::lonxml::register_insert();
1.43 albertel 63: }
64:
1.188 foxr 65:
66: #
1.189 albertel 67: # Decides what targets to render for.
1.188 foxr 68: # Implicit inputs:
69: # Various session environment variables:
1.189 albertel 70: # request.state - published - is a /res/ resource
71: # uploaded - is a /uploaded/ resource
72: # contruct - is a /priv/ resource
73: # form.grade_target - a form parameter requesting a specific target
1.5 albertel 74: sub get_target {
1.204 albertel 75: &Apache::lonxml::debug("request.state = $env{'request.state'}");
76: if( defined($env{'form.grade_target'})) {
77: &Apache::lonxml::debug("form.grade_target= $env{'form.grade_target'}");
1.188 foxr 78: } else {
1.189 albertel 79: &Apache::lonxml::debug("form.grade_target <undefined>");
1.188 foxr 80: }
1.204 albertel 81: if (($env{'request.state'} eq "published") ||
82: ($env{'request.state'} eq "uploaded")) {
83: if ( defined($env{'form.grade_target'} )
84: && ($env{'form.grade_target'} eq 'tex')) {
85: return ($env{'form.grade_target'});
86: } elsif ( defined($env{'form.grade_target'} )
1.145 albertel 87: && ($Apache::lonhomework::viewgrades eq 'F' )) {
1.207 albertel 88: return ($env{'form.grade_target'});
1.244 albertel 89: } elsif ( $env{'form.grade_target'} eq 'webgrade'
90: && ($Apache::lonhomework::queuegrade eq 'F' )) {
91: return ($env{'form.grade_target'});
1.207 albertel 92: }
93: if ($env{'form.webgrade'} &&
1.244 albertel 94: ($Apache::lonhomework::modifygrades eq 'F'
95: || $Apache::lonhomework::queuegrade eq 'F' )) {
1.207 albertel 96: return ('grade','webgrade');
1.145 albertel 97: }
1.204 albertel 98: if ( defined($env{'form.submitted'}) &&
99: ( !defined($env{'form.resetdata'})) &&
100: ( !defined($env{'form.newrandomization'}))) {
1.217 albertel 101: return ('grade', 'web');
1.145 albertel 102: } else {
1.217 albertel 103: return ('web');
1.145 albertel 104: }
1.204 albertel 105: } elsif ($env{'request.state'} eq "construct") {
106: if ( defined($env{'form.grade_target'}) ) {
107: return ($env{'form.grade_target'});
1.145 albertel 108: }
1.204 albertel 109: if ( defined($env{'form.preview'})) {
110: if ( defined($env{'form.submitted'})) {
1.145 albertel 111: return ('grade', 'web');
112: } else {
113: return ('web');
114: }
115: } else {
1.204 albertel 116: if ( $env{'form.problemmode'} eq &mt('View') ||
117: $env{'form.problemmode'} eq &mt('Discard Edits and View')) {
118: if ( defined($env{'form.submitted'}) &&
119: (!defined($env{'form.resetdata'})) &&
120: (!defined($env{'form.newrandomization'}))) {
1.145 albertel 121: return ('grade', 'web','answer');
122: } else {
123: return ('web','answer');
124: }
1.204 albertel 125: } elsif ( $env{'form.problemmode'} eq &mt('Edit') ||
126: $env{'form.problemmode'} eq 'Edit') {
127: if ( $env{'form.submitted'} eq 'edit' ) {
128: if ( $env{'form.submit'} eq &mt('Submit Changes and View') ) {
1.145 albertel 129: return ('modified','web','answer');
130: } else {
1.211 albertel 131: return ('modified','no_output_web','edit');
1.145 albertel 132: }
133: } else {
1.211 albertel 134: return ('no_output_web','edit');
1.145 albertel 135: }
136: } else {
137: return ('web');
138: }
139: }
1.15 albertel 140: }
1.145 albertel 141: return ();
1.5 albertel 142: }
143:
1.3 albertel 144: sub setup_vars {
1.145 albertel 145: my ($target) = @_;
146: return ';'
1.11 albertel 147: # return ';$external::target='.$target.';';
1.2 albertel 148: }
149:
1.36 albertel 150: sub createmenu {
1.145 albertel 151: my ($which,$request)=@_;
152: if ($which eq 'grade') {
153: $request->print('<script language="JavaScript">
1.91 albertel 154: hwkmenu=window.open("/res/adm/pages/homeworkmenu.html","homeworkremote",
1.52 albertel 155: "height=350,width=150,menubar=no");
156: </script>');
1.145 albertel 157: }
1.36 albertel 158: }
159:
1.200 albertel 160: sub proctor_checked_in {
1.226 albertel 161: my ($slot_name,$slot,$type)=@_;
162: my @possible_proctors=split(",",$slot->{'proctor'});
163:
164: my $key;
165: if ($type eq 'Task') {
1.230 albertel 166: my $version=$Apache::lonhomework::history{'resource.0.version'};
167: $key ="resource.$version.0.checkedin";
1.226 albertel 168: } elsif ($type eq 'problem') {
169: $key ='resource.0.checkedin';
170: }
171:
172: foreach my $possible (@possible_proctors) {
173: if ($Apache::lonhomework::history{$key} eq $possible
174: && $Apache::lonhomework::history{$key.'.slot'} eq $slot_name) {
1.202 albertel 175: return 1;
176: }
177: }
1.226 albertel 178:
1.200 albertel 179: return 0;
180: }
181:
1.52 albertel 182: $Apache::lonxml::browse='';
1.152 albertel 183: sub check_ip_acc {
184: my ($acc)=@_;
1.218 albertel 185: &Apache::lonxml::debug("acc is $acc");
186: if (!defined($acc) || $acc =~ /^\s*$/ || $acc =~/^\s*no\s*$/i) {
187: return 1;
188: }
1.152 albertel 189: my $allowed=0;
190: my $ip=$ENV{'REMOTE_ADDR'};
191: my $name;
192: foreach my $pattern (split(',',$acc)) {
1.233 albertel 193: $pattern =~ s/^\s*//;
194: $pattern =~ s/\s*$//;
1.152 albertel 195: if ($pattern =~ /\*$/) {
196: #35.8.*
197: $pattern=~s/\*//;
198: if ($ip =~ /^\Q$pattern\E/) { $allowed=1; }
199: } elsif ($pattern =~ /(\d+\.\d+\.\d+)\.\[(\d+)-(\d+)\]$/) {
200: #35.8.3.[34-56]
201: my $low=$2;
202: my $high=$3;
203: $pattern=$1;
204: if ($ip =~ /^\Q$pattern\E/) {
205: my $last=(split(/\./,$ip))[3];
206: if ($last <=$high && $last >=$low) { $allowed=1; }
207: }
208: } elsif ($pattern =~ /^\*/) {
209: #*.msu.edu
210: $pattern=~s/\*//;
211: if (!defined($name)) {
212: use Socket;
213: my $netaddr=inet_aton($ip);
214: ($name)=gethostbyaddr($netaddr,AF_INET);
1.158 albertel 215: }
1.152 albertel 216: if ($name =~ /\Q$pattern\E$/i) { $allowed=1; }
217: } elsif ($pattern =~ /\d+\.\d+\.\d+\.\d+/) {
218: #127.0.0.1
219: if ($ip =~ /^\Q$pattern\E/) { $allowed=1; }
220: } else {
221: #some.name.com
222: if (!defined($name)) {
223: use Socket;
224: my $netaddr=inet_aton($ip);
225: ($name)=gethostbyaddr($netaddr,AF_INET);
226: }
227: if ($name =~ /\Q$pattern\E$/i) { $allowed=1; }
228: }
229: if ($allowed) { last; }
230: }
231: return $allowed;
232: }
1.198 albertel 233:
1.226 albertel 234: sub check_slot_access {
235: my ($id,$type)=@_;
236:
1.207 albertel 237: # does it pass normal muster
1.226 albertel 238: my ($status,$datemsg)=&check_access($id);
239:
240: my $useslots = &Apache::lonnet::EXT("resource.$id.useslots");
1.245 albertel 241: if ($useslots ne 'resource' && $useslots ne 'map') {
1.226 albertel 242: return ($status,$datemsg);
243: }
244:
1.200 albertel 245: if ($status eq 'SHOW_ANSWER' ||
246: $status eq 'CLOSED' ||
247: $status eq 'INVALID_ACCESS' ||
248: $status eq 'UNAVAILABLE') {
249: return ($status,$datemsg);
250: }
1.204 albertel 251: if ($env{'request.state'} eq "construct") {
1.203 albertel 252: return ($status,$datemsg);
253: }
1.226 albertel 254:
255: if ($type eq 'Task') {
256: my $version=$Apache::lonhomework::history{'resource.version'};
1.230 albertel 257: if ($Apache::lonhomework::history{"resource.$version.0.checkedin"} &&
258: $Apache::lonhomework::history{"resource.$version.0.status"} eq 'pass') {
1.226 albertel 259: return ('SHOW_ANSWER');
260: }
1.207 albertel 261: }
1.226 albertel 262:
1.210 albertel 263: my @slots=
264: (split(':',&Apache::lonnet::EXT("resource.$id.availablestudent")),
265: split(':',&Apache::lonnet::EXT("resource.$id.available")));
266:
1.200 albertel 267: # if (!@slots) {
268: # return ($status,$datemsg);
269: # }
270: my $slotstatus='NOT_IN_A_SLOT';
1.206 albertel 271: my ($returned_slot,$slot_name);
1.210 albertel 272: foreach my $slot (@slots) {
1.241 albertel 273: $slot =~ s/(^\s*|\s*$)//g;
1.201 albertel 274: &Apache::lonxml::debug("getting $slot");
1.200 albertel 275: my %slot=&Apache::lonnet::get_slot($slot);
1.201 albertel 276: &Apache::lonhomework::showhash(%slot);
1.200 albertel 277: if ($slot{'starttime'} < time &&
278: $slot{'endtime'} > time &&
1.201 albertel 279: &check_ip_acc($slot{'ip'})) {
1.202 albertel 280: &Apache::lonxml::debug("$slot is good");
281: $slotstatus='NEEDS_CHECKIN';
282: $returned_slot=\%slot;
1.206 albertel 283: $slot_name=$slot;
1.200 albertel 284: last;
285: }
286: }
1.202 albertel 287: if ($slotstatus eq 'NEEDS_CHECKIN' &&
1.226 albertel 288: &proctor_checked_in($slot_name,$returned_slot,$type)) {
1.202 albertel 289: &Apache::lonxml::debug("protoctor checked in");
1.200 albertel 290: $slotstatus='CAN_ANSWER';
291: }
1.226 albertel 292:
1.235 albertel 293: my ($is_correct,$got_grade,$checkedin);
1.226 albertel 294: if ($type eq 'Task') {
1.230 albertel 295: my $version=$Apache::lonhomework::history{'resource.0.version'};
1.231 albertel 296: $got_grade =
297: ($Apache::lonhomework::history{"resource.$version.0.status"}
298: =~ /^(?:pass|fail)$/);
1.235 albertel 299: $is_correct =
300: ($Apache::lonhomework::history{"resource.$version.0.status"} eq 'pass'
301: || $Apache::lonhomework::history{"resource.0.solved"} =~ /^correct_/ );
1.226 albertel 302: $checkedin =
1.230 albertel 303: $Apache::lonhomework::history{"resource.$version.0.checkedin"};
1.226 albertel 304: } elsif ($type eq 'problem') {
1.231 albertel 305: $got_grade = 1;
1.226 albertel 306: $checkedin = $Apache::lonhomework::history{"resource.0.checkedin"};
307: }
308:
1.235 albertel 309: &Apache::lonxml::debug(" slot is $slotstatus checkedin ($checkedin) got_grade ($got_grade) is_correct ($is_correct)");
310:
1.243 albertel 311: # no slot is currently open, and has been checked in for this version
312: # but hasn't got a grade, therefore must be awaiting a grade
313: if (!defined($slot_name)
314: && $checkedin
1.236 albertel 315: && !$got_grade) {
316: return ('WAITING_FOR_GRADE');
317: }
318:
1.226 albertel 319: if ($slotstatus eq 'NOT_IN_A_SLOT'
320: && $checkedin ) {
321:
1.231 albertel 322: if ($got_grade) {
1.209 albertel 323: return ('SHOW_ANSWER');
324: } else {
325: return ('WAITING_FOR_GRADE');
326: }
1.226 albertel 327:
1.207 albertel 328: }
1.235 albertel 329: if ( $is_correct) {
330: return ('SHOW_ANSWER');
331: }
1.225 albertel 332: if ( $status eq 'CANNOT_ANSWER' &&
333: ($slotstatus ne 'NEEDS_CHECKIN' && $slotstatus ne 'NOT_IN_A_SLOT')) {
334: return ($status,$datemsg);
335: }
336:
1.206 albertel 337: return ($slotstatus,$datemsg,$slot_name,$returned_slot);
1.198 albertel 338: }
1.200 albertel 339:
1.92 bowersj2 340: # JB, 9/24/2002: Any changes in this function may require a change
341: # in lonnavmaps::resource::getDateStatus.
1.53 www 342: sub check_access {
1.145 albertel 343: my ($id) = @_;
344: my $date ='';
345: my $status;
346: my $datemsg = '';
347: my $lastdate = '';
348: my $type;
349: my $passed;
350:
1.204 albertel 351: if ($env{'request.state'} eq "construct") {
352: if ($env{'form.problemstate'}) {
353: if ($env{'form.problemstate'} =~ /^CANNOT_ANSWER/) {
354: if ( ! ($env{'form.problemstate'} eq 'CANNOT_ANSWER_correct' &&
1.167 albertel 355: lc($Apache::lonhomework::problemstatus) eq 'no')) {
1.168 albertel 356: return ('CANNOT_ANSWER',
1.174 www 357: &mt('is in this state due to author settings.'));
1.167 albertel 358: }
1.165 albertel 359: } else {
1.204 albertel 360: return ($env{'form.problemstate'},
1.174 www 361: &mt('is in this state due to author settings.'));
1.165 albertel 362: }
363: }
1.145 albertel 364: &Apache::lonxml::debug("in construction ignoring dates");
365: $status='CAN_ANSWER';
1.146 albertel 366: $datemsg=&mt('is in under construction');
1.163 albertel 367: # return ($status,$datemsg);
1.145 albertel 368: }
369:
370: &Apache::lonxml::debug("checking for part :$id:");
371: &Apache::lonxml::debug("time:".time);
1.152 albertel 372:
1.212 albertel 373: my ($symb)=&Apache::lonxml::whichuser();
374: &Apache::lonxml::debug("symb:".$symb);
375: #if ($env{'request.state'} ne "construct" && $symb ne '') {
1.204 albertel 376: if ($env{'request.state'} ne "construct") {
1.163 albertel 377: my $allowed=&check_ip_acc(&Apache::lonnet::EXT("resource.$id.acc"));
378: if (!$allowed && ($Apache::lonhomework::browse ne 'F')) {
379: $status='INVALID_ACCESS';
380: $date=&mt("can not be accessed from your location.");
1.145 albertel 381: return($status,$date);
382: }
1.163 albertel 383:
1.226 albertel 384: foreach my $temp ("opendate","duedate","answerdate") {
1.163 albertel 385: $lastdate = $date;
386: $date = &Apache::lonnet::EXT("resource.$id.$temp");
387: my $thistype = &Apache::lonnet::EXT("resource.$id.$temp.type");
388: if ($thistype =~ /^(con_lost|no_such_host)/ ||
389: $date =~ /^(con_lost|no_such_host)/) {
390: $status='UNAVAILABLE';
391: $date=&mt("may open later.");
392: return($status,$date);
393: }
394: if ($thistype eq 'date_interval') {
395: if ($temp eq 'opendate') {
396: $date=&Apache::lonnet::EXT("resource.$id.duedate")-$date;
397: }
398: if ($temp eq 'answerdate') {
399: $date=&Apache::lonnet::EXT("resource.$id.duedate")+$date;
400: }
1.145 albertel 401: }
1.163 albertel 402: &Apache::lonxml::debug("found :$date: for :$temp:");
403: if ($date eq '') {
404: $date = &mt("an unknown date"); $passed = 0;
405: } elsif ($date eq 'con_lost') {
406: $date = &mt("an indeterminate date"); $passed = 0;
407: } else {
408: if (time < $date) { $passed = 0; } else { $passed = 1; }
409: $date = localtime $date;
1.145 albertel 410: }
1.163 albertel 411: if (!$passed) { $type=$temp; last; }
1.145 albertel 412: }
1.163 albertel 413: &Apache::lonxml::debug("have :$type:$passed:");
414: if ($passed) {
415: $status='SHOW_ANSWER';
416: $datemsg=$date;
417: } elsif ($type eq 'opendate') {
418: $status='CLOSED';
419: $datemsg = &mt("will open on")." $date";
420: } elsif ($type eq 'duedate') {
421: $status='CAN_ANSWER';
422: $datemsg = &mt("is due at")." $date";
423: } elsif ($type eq 'answerdate') {
424: $status='CLOSED';
425: $datemsg = &mt("was due on")." $lastdate".&mt(", and answers will be available on")." $date";
1.145 albertel 426: }
427: }
1.212 albertel 428: if ($status eq 'CAN_ANSWER' ||
429: (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED'))) {
1.145 albertel 430: #check #tries, and if correct.
431: my $tries = $Apache::lonhomework::history{"resource.$id.tries"};
432: my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
433: if ( $tries eq '' ) { $tries = '0'; }
1.164 albertel 434: if ( $maxtries eq '' &&
1.204 albertel 435: $env{'request.state'} ne 'construct') { $maxtries = '2'; }
1.164 albertel 436: if ($maxtries && $tries >= $maxtries) { $status = 'CANNOT_ANSWER'; }
1.145 albertel 437: # if (correct and show prob status) or excused then CANNOT_ANSWER
438: if(($Apache::lonhomework::history{"resource.$id.solved"}=~/^correct/
439: &&
440: lc($Apache::lonhomework::problemstatus) ne 'no')
441: ||
442: $Apache::lonhomework::history{"resource.$id.solved"}=~/^excused/) {
443: $status = 'CANNOT_ANSWER';
444: }
1.121 albertel 445: }
1.181 albertel 446: if ($status eq 'CAN_ANSWER' || $status eq 'CANNOT_ANSWER') {
1.177 albertel 447: my $interval=&Apache::lonnet::EXT("resource.$id.interval");
448: &Apache::lonxml::debug("looking for interval $interval");
449: if ($interval) {
450: my $first_access=&Apache::lonnet::get_first_access('map');
451: &Apache::lonxml::debug("looking for accesstime $first_access");
452: if (!$first_access) {
453: $status='NOT_YET_VIEWED';
1.192 albertel 454: $datemsg=&seconds_to_human_length($interval);
1.177 albertel 455: } else {
456: my $newdate=localtime($first_access+$interval);
457: if (time > ($first_access+$interval)) {
458: $status='CLOSED';
459: $datemsg = &mt("was due on")." $newdate".&mt(", and answers will be available on")." $date";
460: } else {
461: $datemsg = &mt("is due at")." $newdate";
462: }
463: }
464: }
465: }
1.133 albertel 466: #if (($status ne 'CLOSED') && ($Apache::lonhomework::type eq 'exam') &&
467: # (!$Apache::lonhomework::history{"resource.0.outtoken"})) {
468: # return ('UNCHECKEDOUT','needs to be checked out');
469: #}
1.54 www 470:
471:
1.145 albertel 472: &Apache::lonxml::debug("sending back :$status:$datemsg:");
473: if (($Apache::lonhomework::browse eq 'F') && ($status eq 'CLOSED')) {
474: &Apache::lonxml::debug("should be allowed to browse a resource when closed");
475: $status='CAN_ANSWER';
1.146 albertel 476: $datemsg=&mt('is closed but you are allowed to view it');
1.145 albertel 477: }
1.106 albertel 478:
1.145 albertel 479: return ($status,$datemsg);
1.20 albertel 480: }
481:
1.246 ! albertel 482: sub due_date {
! 483: my ($part_id,$symb)=@_;
! 484: my $date;
! 485: my $interval= &Apache::lonnet::EXT("resource.$part_id.interval",$symb);
! 486: if ($interval) {
! 487: my $first_access=&Apache::lonnet::get_first_access('map',$symb);
! 488: if ($first_access) { $date = $first_access+$interval; }
! 489: }
! 490: if (!defined($date)) {
! 491: $date = &Apache::lonnet::EXT("resource.$part_id.duedate",$symb);
! 492: }
! 493: return $date
! 494: }
! 495:
1.192 albertel 496: sub seconds_to_human_length {
497: my ($length)=@_;
498:
499: my $seconds=$length%60; $length=int($length/60);
500: my $minutes=$length%60; $length=int($length/60);
501: my $hours=$length%24; $length=int($length/24);
502: my $days=$length;
503:
504: my $timestr;
505: if ($days > 0) { $timestr.=&mt('[quant,_1,day]',$days); }
506: if ($hours > 0) { $timestr.=($timestr?", ":"").
507: &mt('[quant,_1,hour]',$hours); }
508: if ($minutes > 0) { $timestr.=($timestr?", ":"").
509: &mt('[quant,_1,minute]',$minutes); }
510: if ($seconds > 0) { $timestr.=($timestr?", ":"").
511: &mt('[quant,_1,second]',$seconds); }
512: return $timestr;
513: }
514:
1.41 albertel 515: sub showhash {
1.145 albertel 516: my (%hash) = @_;
517: &showhashsubset(\%hash,'.');
518: return '';
1.79 albertel 519: }
520:
1.106 albertel 521: sub showarray {
522: my ($array)=@_;
523: my $string="(";
524: foreach my $elm (@{ $array }) {
1.193 albertel 525: if (ref($elm) eq 'ARRAY') {
526: $string.=&showarray($elm);
527: } elsif (ref($elm) eq 'HASH') {
528: $string.= "HASH --- \n<br />";
529: $string.= &showhashsubset($elm,'.');
1.106 albertel 530: } else {
531: $string.="$elm,"
532: }
533: }
534: chop($string);
535: $string.=")";
536: return $string;
537: }
538:
1.79 albertel 539: sub showhashsubset {
1.145 albertel 540: my ($hash,$keyre) = @_;
541: my $resultkey;
542: foreach $resultkey (sort keys %$hash) {
1.193 albertel 543: if ($resultkey !~ /$keyre/) { next; }
544: if (ref($$hash{$resultkey}) eq 'ARRAY' ) {
545: &Apache::lonxml::debug("$resultkey ---- ".
546: &showarray($$hash{$resultkey}));
547: } elsif (ref($$hash{$resultkey}) eq 'HASH' ) {
548: &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
549: &showhashsubset($$hash{$resultkey},'.');
550: } else {
551: &Apache::lonxml::debug("$resultkey ---- $$hash{$resultkey}");
1.145 albertel 552: }
553: }
554: &Apache::lonxml::debug("\n<br />restored values^</br>\n");
555: return '';
1.41 albertel 556: }
557:
558: sub setuppermissions {
1.204 albertel 559: $Apache::lonhomework::browse= &Apache::lonnet::allowed('bre',$env{'request.filename'});
560: my $viewgrades = &Apache::lonnet::allowed('vgr',$env{'request.course.id'});
1.145 albertel 561: if (! $viewgrades &&
1.204 albertel 562: exists($env{'request.course.sec'}) &&
563: $env{'request.course.sec'} !~ /^\s*$/) {
564: $viewgrades = &Apache::lonnet::allowed('vgr',$env{'request.course.id'}.
565: '/'.$env{'request.course.sec'});
1.145 albertel 566: }
1.244 albertel 567: $Apache::lonhomework::viewgrades = $viewgrades;
568:
1.185 albertel 569: if ($Apache::lonhomework::browse eq 'F' &&
1.204 albertel 570: $env{'form.devalidatecourseresdata'} eq 'on') {
1.185 albertel 571: my (undef,$courseid) = &Apache::lonxml::whichuser();
1.204 albertel 572: &Apache::lonnet::devalidatecourseresdata($env{"course.$courseid.num"},
573: $env{"course.$courseid.domain"});
1.185 albertel 574: }
1.244 albertel 575:
1.205 albertel 576: my $modifygrades = &Apache::lonnet::allowed('mgr',$env{'request.course.id'});
577: if (! $modifygrades &&
578: exists($env{'request.course.sec'}) &&
579: $env{'request.course.sec'} !~ /^\s*$/) {
580: $modifygrades =
581: &Apache::lonnet::allowed('mgr',$env{'request.course.id'}.
582: '/'.$env{'request.course.sec'});
583: }
584: $Apache::lonhomework::modifygrades = $modifygrades;
1.244 albertel 585:
586: my $queuegrade = &Apache::lonnet::allowed('mqg',$env{'request.course.id'});
587: if (! $queuegrade &&
588: exists($env{'request.course.sec'}) &&
589: $env{'request.course.sec'} !~ /^\s*$/) {
590: $queuegrade =
591: &Apache::lonnet::allowed('qgr',$env{'request.course.id'}.
592: '/'.$env{'request.course.sec'});
593: }
594: $Apache::lonhomework::queuegrade = $queuegrade;
1.205 albertel 595: return '';
1.41 albertel 596: }
597:
598: sub setupheader {
1.120 albertel 599: my $request=$_[0];
1.197 albertel 600: &Apache::loncommon::content_type($request,'text/html');
1.120 albertel 601: if (!$Apache::lonxml::debug && ($ENV{'REQUEST_METHOD'} eq 'GET')) {
602: &Apache::loncommon::no_cache($request);
603: }
1.196 albertel 604: # $request->set_last_modified(&Apache::lonnet::metadata($request->uri,
605: # 'lastrevisiondate'));
1.120 albertel 606: $request->send_http_header;
607: return OK if $request->header_only;
608: return ''
1.41 albertel 609: }
1.35 albertel 610:
1.47 albertel 611: sub handle_save_or_undo {
1.145 albertel 612: my ($request,$problem,$result) = @_;
613: my $file = &Apache::lonnet::filelocation("",$request->uri);
614: my $filebak =$file.".bak";
615: my $filetmp =$file.".tmp";
616: my $error=0;
1.156 albertel 617:
618: &Apache::lonnet::correct_line_ends($result);
1.52 albertel 619:
1.204 albertel 620: if ($env{'form.Undo'} eq &mt('undo')) {
1.145 albertel 621: my $error=0;
622: if (!copy($file,$filetmp)) { $error=1; }
623: if ((!$error) && (!copy($filebak,$file))) { $error=1; }
624: if ((!$error) && (!move($filetmp,$filebak))) { $error=1; }
625: if (!$error) {
1.171 albertel 626: &Apache::lonxml::info("<p><b>".&mt("Undid changes, Switched")." $filebak ".&mt("and")." $file</b></p>");
1.145 albertel 627: } else {
1.171 albertel 628: &Apache::lonxml::info("<p><font color=\"red\" size=\"+1\"><b>".&mt("Unable to undo, unable to switch")." $filebak ".&mt("and")." $file</b></font></p>");
1.145 albertel 629: $error=1;
630: }
1.52 albertel 631: } else {
1.145 albertel 632: my $fs=Apache::File->new(">$filebak");
633: if (defined($fs)) {
634: print $fs $$problem;
1.171 albertel 635: &Apache::lonxml::info("<b>".&mt("Making Backup to").
636: " $filebak</b>");
1.145 albertel 637: } else {
1.171 albertel 638: &Apache::lonxml::info("<font color=\"red\" size=\"+1\"><b>".&mt("Unable to make backup")." $filebak</b></font>");
1.145 albertel 639: $error=2;
640: }
641: my $fh=Apache::File->new(">$file");
642: if (defined($fh)) {
643: print $fh $$result;
1.171 albertel 644: &Apache::lonxml::info("<b>".&mt("Saving Modifications to").
645: " $file</b>");
1.145 albertel 646: } else {
1.171 albertel 647: &Apache::lonxml::info("<font color=\"red\" size=\"+1\"><b>".
648: &mt("Unable to write to")." $file</b></font>");
1.145 albertel 649: $error|=4;
650: }
1.52 albertel 651: }
1.145 albertel 652: return $error;
1.64 albertel 653: }
654:
1.101 albertel 655: sub analyze_header {
656: my ($request) = @_;
1.238 albertel 657: my $result =
1.240 albertel 658: &Apache::loncommon::start_page('Analyzing a problem',undef);
659:
1.238 albertel 660: $result .=
661: &Apache::lonxml::message_location().'
1.101 albertel 662: <form name="lonhomework" method="POST" action="'.
1.204 albertel 663: &HTML::Entities::encode($env{'request.uri'},'<>&"').'">'.
1.179 albertel 664: &Apache::structuretags::remember_problem_state().'
1.146 albertel 665: <input type="submit" name="problemmode" value="'.&mt("EditXML").'" />
666: <input type="submit" name="problemmode" value="'.&mt('Edit').'" />
1.101 albertel 667: <hr />
1.146 albertel 668: <input type="submit" name="submit" value="'.&mt("View").'" />
1.101 albertel 669: <hr />
670: </form>';
1.171 albertel 671: &Apache::lonxml::add_messages(\$result);
1.101 albertel 672: $request->print($result);
673: $request->rflush();
674: }
675:
1.109 albertel 676: sub analyze_footer {
677: my ($request) = @_;
1.237 albertel 678: $request->print(&Apache::loncommon::end_page());
1.109 albertel 679: $request->rflush();
680: }
681:
1.74 albertel 682: sub analyze {
1.101 albertel 683: my ($request,$file) = @_;
684: &Apache::lonxml::debug("Analyze");
685: my $result;
686: my %overall;
1.219 www 687: my %seedexample;
1.101 albertel 688: my %allparts;
1.204 albertel 689: my $rndseed=$env{'form.rndseed'};
1.101 albertel 690: &analyze_header($request);
1.114 albertel 691: my %prog_state=
1.146 albertel 692: &Apache::lonhtmlcommon::Create_PrgWin($request,&mt('Analyze Progress'),
693: &mt('Getting Problem Variants'),
1.204 albertel 694: $env{'form.numtoanalyze'},
1.175 albertel 695: 'inline',undef);
1.204 albertel 696: for(my $i=1;$i<$env{'form.numtoanalyze'}+1;$i++) {
1.114 albertel 697: &Apache::lonhtmlcommon::Increment_PrgWin($request,\%prog_state,
1.146 albertel 698: &mt('last problem'));
1.182 albertel 699: if (&Apache::loncommon::connection_aborted($request)) { return; }
1.219 www 700: my $thisseed=$i+$rndseed;
1.101 albertel 701: my $subresult=&Apache::lonnet::ssi($request->uri,
702: ('grade_target' => 'analyze'),
1.219 www 703: ('rndseed' => $thisseed));
1.101 albertel 704: (my $garbage,$subresult)=split(/_HASH_REF__/,$subresult,2);
705: my %analyze=&Apache::lonnet::str2hash($subresult);
1.114 albertel 706: my @parts;
707: if (defined(@{ $analyze{'parts'} })) {
708: @parts=@{ $analyze{'parts'} };
709: }
1.101 albertel 710: foreach my $part (@parts) {
711: if (!exists($allparts{$part})) {$allparts{$part}=1;};
1.109 albertel 712: if ($analyze{$part.'.type'} eq 'numericalresponse' ||
713: $analyze{$part.'.type'} eq 'stringresponse' ||
714: $analyze{$part.'.type'} eq 'formularesponse' ) {
1.219 www 715: my $concatanswer=join("\0",@{ $analyze{$part.'.answer'} });
716: if (($concatanswer eq '') || ($concatanswer=~/^\@/)) {
717: @{$analyze{$part.'.answer'}}=('<font color="red">'.&mt('Error').'</font>');
718: }
1.101 albertel 719: push( @{ $overall{$part.'.answer'} },
720: [@{ $analyze{$part.'.answer'} }]);
1.219 www 721: $seedexample{join("\0",@{ $analyze{$part.'.answer'}})}=$thisseed;
1.101 albertel 722: }
723: }
724: }
1.114 albertel 725: &Apache::lonhtmlcommon::Update_PrgWin($request,\%prog_state,
1.146 albertel 726: &mt('Analyzing Results'));
1.175 albertel 727: $request->print('<hr />'.&mt('List of possible answers').': ');
1.134 albertel 728: foreach my $part (sort(keys(%allparts))) {
1.109 albertel 729: if (defined(@{ $overall{$part.'.answer'} })) {
1.132 albertel 730: my $num_cols=scalar(@{ $overall{$part.'.answer'}->[0] });
1.221 albertel 731: $request->print('<table class="thinborder"><tr><th colspan="'.($num_cols+1).'">'.&mt('Part').' '.$part.'</th></tr>');
1.130 albertel 732: my %frequency;
1.109 albertel 733: foreach my $answer (sort {$a->[0] <=> $b->[0]} (@{ $overall{$part.'.answer'} })) {
1.132 albertel 734: $frequency{join("\0",@{ $answer })}++;
1.130 albertel 735: }
1.219 www 736: $request->print('<tr><th colspan="'.($num_cols).'">'.&mt('Answer').'</th><th>'.&mt('Frequency').'<br />('
737: .&mt('click for example').')</th></tr>');
1.132 albertel 738: foreach my $answer (sort {(split("\0",$a))[0] <=> (split("\0",$b))[0]} (keys(%frequency))) {
1.220 albertel 739: $request->print('<tr><td class="center">'.
740: join('</td><td class="center">',split("\0",$answer)).
741: '</td><td class="center"><a href="'.$request->uri.'?rndseed='.$seedexample{$answer}.'">'.$frequency{$answer}.
1.219 www 742: '</a></td></tr>');
1.109 albertel 743: }
744: $request->print('</table>');
745: } else {
1.162 albertel 746: $request->print('<p>'.&mt('Response').' '.$part.' '.
1.146 albertel 747: &mt('is not analyzable at this time').'</p>');
1.101 albertel 748: }
749: }
1.130 albertel 750: if (scalar(keys(%allparts)) == 0 ) {
1.215 raeburn 751: $request->print('<p>'.&mt('Found no analyzable responses in this problem, currently only Numerical, Formula and String response styles are supported.').'</p>');
1.130 albertel 752: }
1.114 albertel 753: &Apache::lonhtmlcommon::Close_PrgWin($request,\%prog_state);
1.109 albertel 754: &analyze_footer($request);
1.101 albertel 755: &Apache::lonhomework::showhash(%overall);
756: return $result;
1.74 albertel 757: }
758:
1.64 albertel 759: sub editxmlmode {
1.145 albertel 760: my ($request,$file) = @_;
761: my $result;
762: my $problem=&Apache::lonnet::getfile($file);
763: if ($problem eq -1) {
1.146 albertel 764: &Apache::lonxml::error("<b> ".&mt('Unable to find').
765: " <i>$file</i></b>");
1.145 albertel 766: $problem='';
767: }
1.204 albertel 768: if (defined($env{'form.editxmltext'}) || defined($env{'form.Undo'})) {
1.145 albertel 769: my $error=&handle_save_or_undo($request,\$problem,
1.204 albertel 770: \$env{'form.editxmltext'});
1.145 albertel 771: if (!$error) { $problem=&Apache::lonnet::getfile($file); }
772: }
1.204 albertel 773: &Apache::lonhomework::showhashsubset(\%env,'^form');
774: if ( $env{'form.submit'} eq &mt('Submit Changes and View') ) {
775: &Apache::lonhomework::showhashsubset(\%env,'^form');
776: $env{'form.problemmode'}='View';
1.145 albertel 777: &renderpage($request,$file);
778: } else {
779: my ($rows,$cols) = &Apache::edit::textarea_sizes(\$problem);
1.160 www 780: my $xml_help = '<table><tr><td>'.
781: &Apache::loncommon::helpLatexCheatsheet("Problem_Editor_XML_Index",
782: "Problem Editing Help").
783: '</td><td>'.
1.178 albertel 784: &Apache::loncommon::help_open_menu('',undef,undef,undef,5,'Authoring').
785: '</td></tr></table>';
1.145 albertel 786: if ($cols > 80) { $cols = 80; }
787: if ($cols < 70) { $cols = 70; }
788: if ($rows < 20) { $rows = 20; }
1.238 albertel 789: my $start_page =
790: &Apache::loncommon::start_page("EditXML $file",
1.240 albertel 791: &Apache::edit::js_change_detection());
1.227 albertel 792:
1.238 albertel 793: $result.=$start_page.
1.213 albertel 794: &renderpage($request,$file,['no_output_web'],1).
795: &Apache::lonxml::message_location().'
1.227 albertel 796: <form '.&Apache::edit::form_change_detection().' name="lonhomework" method="POST" action="'.
1.204 albertel 797: &HTML::Entities::encode($env{'request.uri'},'<>&"').'">'.
1.179 albertel 798: &Apache::structuretags::remember_problem_state().'
1.146 albertel 799: <input type="hidden" name="problemmode" value="'.&mt('EditXML').'" />
1.170 matthew 800: <input type="submit" name="problemmode" accesskey="d" value="'.&mt('Discard Edits and View').'" />
1.232 albertel 801: <input type="submit" '.&Apache::edit::submit_ask_anyway().'name="problemmode" accesskey="e" value="'.&mt('Edit').'" />
1.228 albertel 802: <input type="submit" name="Undo" accesskey="u" value="'.&mt('undo').'" />
1.64 albertel 803: <hr />
1.170 matthew 804: <input type="submit" name="submit" accesskey="s" value="'.&mt('Submit Changes').'" />
805: <input type="submit" name="submit" accesskey="v" value="'.&mt('Submit Changes and View').'" />
1.64 albertel 806: <hr />
1.110 albertel 807: ' . $xml_help . '
1.227 albertel 808: <textarea '.&Apache::edit::element_change_detection().' style="width:100%" rows="'.$rows.'" cols="'.$cols.'" name="editxmltext">'.
1.229 albertel 809: &HTML::Entities::encode($problem,'<>&"').'</textarea><br />
810: <input type="submit" name="submit" accesskey="s" value="'.&mt('Submit Changes').'" />
811: <input type="submit" name="submit" accesskey="v" value="'.&mt('Submit Changes and View').'" />
1.238 albertel 812: </form>'.&Apache::loncommon::end_page();
1.171 albertel 813: &Apache::lonxml::add_messages(\$result);
1.145 albertel 814: $request->print($result);
815: }
816: return '';
1.47 albertel 817: }
1.189 albertel 818:
1.188 foxr 819: #
820: # Render the page in whatever target desired.
821: #
1.41 albertel 822: sub renderpage {
1.213 albertel 823: my ($request,$file,$targets,$return_string) = @_;
1.52 albertel 824:
1.211 albertel 825: my @targets = @{$targets || [&get_target()]};
1.204 albertel 826: &Apache::lonhomework::showhashsubset(\%env,'form.');
1.145 albertel 827: &Apache::lonxml::debug("Running targets ".join(':',@targets));
1.171 albertel 828: my $overall_result;
1.145 albertel 829: foreach my $target (@targets) {
1.183 albertel 830: # FIXME need to do something intelligent when a problem goes
831: # from viewable to not viewable due to map conditions
832: #&setuppermissions();
833: #if ( $Apache::lonhomework::browse ne '2'
834: # && $Apache::lonhomework::browse ne 'F' ) {
835: # $request->print(" You most likely shouldn't see me.");
836: #}
1.145 albertel 837: #my $t0 = [&gettimeofday()];
1.211 albertel 838: my $output=1;
839: if ($target eq 'no_output_web') {
840: $target = 'web'; $output=0;
841: }
1.145 albertel 842: my $problem=&Apache::lonnet::getfile($file);
1.222 albertel 843: my $result;
1.145 albertel 844: if ($problem eq -1) {
1.222 albertel 845: my $filename=(split('/',$file))[-1];
846: $result.="<b> ".&mt('Unable to find')." <i>$filename</i></b>";
1.145 albertel 847: $problem='';
848: }
1.52 albertel 849:
1.145 albertel 850: my %mystyle;
851: if ($target eq 'analyze') { %Apache::lonhomework::analyze=(); }
852: if ($target eq 'answer') { &showhash(%Apache::lonhomework::history); }
1.204 albertel 853: if ($target eq 'web') {&Apache::lonhomework::showhashsubset(\%env,'^form');}
1.145 albertel 854:
855: &Apache::lonxml::debug("Should be parsing now");
1.222 albertel 856: $result .= &Apache::lonxml::xmlparse($request, $target, $problem,
857: &setup_vars($target),%mystyle);
1.145 albertel 858: undef($Apache::lonhomework::parsing_a_problem);
1.214 albertel 859: if (!$output) { $result = ''; }
1.145 albertel 860: #$request->print("Result follows:");
861: if ($target eq 'modified') {
862: &handle_save_or_undo($request,\$problem,\$result);
863: } else {
864: if ($target eq 'analyze') {
865: $result=&Apache::lonnet::hashref2str(\%Apache::lonhomework::analyze);
866: undef(%Apache::lonhomework::analyze);
867: }
868: #my $td=&tv_interval($t0);
869: #if ( $Apache::lonxml::debug) {
870: #$result =~ s:</body>::;
871: #$result.="<br />Spent $td seconds processing target $target\n</body>";
872: #}
1.171 albertel 873: # $request->print($result);
874: $overall_result.=$result;
875: # $request->rflush();
1.145 albertel 876: }
877: #$request->print(":Result ends");
878: #my $td=&tv_interval($t0);
1.52 albertel 879: }
1.213 albertel 880: if (!$return_string) {
881: &Apache::lonxml::add_messages(\$overall_result);
882: $request->print($overall_result);
883: $request->rflush();
884: } else {
885: return $overall_result;
886: }
1.41 albertel 887: }
888:
1.42 albertel 889: # with no arg it returns a HTML <option> list of the template titles
890: # with one arg it returns the filename associated with the arg passed
891: sub get_template_list {
1.145 albertel 892: my ($namewanted,$extension) = @_;
893: my $result;
894: my @allnames;
895: &Apache::lonxml::debug("Looking for :$extension:");
896: foreach my $file (</home/httpd/html/res/adm/includes/templates/*.$extension>) {
897: my $name=&Apache::lonnet::metadata($file,'title');
898: if ($namewanted && ($name eq $namewanted)) {
899: $result=$file;
900: last;
901: } else {
902: if ($name) { push (@allnames, $name); }
903: }
904: }
905: if (@allnames && !$result) {
1.146 albertel 906: $result="<option>".&mt("Select a")." $extension ".&mt('template')."</option>\n<option>".
1.145 albertel 907: join('</option><option>',sort(@allnames)).'</option>';
1.42 albertel 908: }
1.145 albertel 909: return $result;
1.42 albertel 910: }
911:
912: sub newproblem {
1.65 matthew 913: my ($request) = @_;
914: my $extension=$request->uri;
915: $extension=~s:^.*\.([\w]+)$:$1:;
916: &Apache::lonxml::debug("Looking for :$extension:");
1.131 albertel 917: my $templatelist=&get_template_list('',$extension);
1.204 albertel 918: if ($env{'form.template'} &&
919: $env{'form.template'} ne "Select a $extension template") {
1.65 matthew 920: use File::Copy;
1.204 albertel 921: my $file = &get_template_list($env{'form.template'},$extension);
1.65 matthew 922: my $dest = &Apache::lonnet::filelocation("",$request->uri);
923: copy($file,$dest);
924: &renderpage($request,$dest);
1.204 albertel 925: } elsif($env{'form.newfile'} && !$templatelist) {
1.131 albertel 926: # I don't like hard-coded filenames but for now, this will work.
927: use File::Copy;
928: my $templatefilename =
929: $request->dir_config('lonIncludes').'/templates/blank.problem';
930: &Apache::lonxml::debug("$templatefilename");
931: my $dest = &Apache::lonnet::filelocation("",$request->uri);
932: copy($templatefilename,$dest);
933: &renderpage($request,$dest);
1.85 albertel 934: } else {
1.176 albertel 935: my $url=&HTML::Entities::encode($request->uri,'<>&"');
936: my $shownurl=$url;
1.157 albertel 937: $shownurl=~s-^/~-/priv/-;
1.65 matthew 938: my $dest = &Apache::lonnet::filelocation("",$request->uri);
1.128 albertel 939: my $errormsg;
1.204 albertel 940: if ($env{'form.newfile'}) {
1.146 albertel 941: $errormsg='<p><font color="red">'.&mt('You did not select a template.').'</font></p>'."\n";
1.128 albertel 942: }
1.85 albertel 943: my $instructions;
1.240 albertel 944: my $start_page =
945: &Apache::loncommon::start_page("Create New $extension");
1.146 albertel 946: if ($templatelist) { $instructions=&mt(", select a template from the pull-down menu below.").'<br />'.&mt("Then");}
1.147 albertel 947: my %lt=&Apache::lonlocal::texthash( 'create' => 'Creating a new',
1.146 albertel 948: 'resource' => 'resource',
949: 'requested' => 'The requested file',
950: 'not exist' => 'currently does not exist',
951: 'createnew' => 'To create a new',
952: 'click' => 'click on the',
953: 'Create' => 'Create',
954: 'button' => 'button');
1.65 matthew 955: $request->print(<<ENDNEWPROBLEM);
1.240 albertel 956: $start_page
1.148 albertel 957: <h1>$lt{'create'} $extension $lt{'resource'}</h1>
1.128 albertel 958: $errormsg
1.157 albertel 959: $lt{'requested'} <tt>$shownurl</tt> $lt{'not exist'}.
1.105 www 960: <p>
1.146 albertel 961: <b>$lt{'createnew'} $extension$instructions $lt{'click'} "$lt{'Create'} $extension" $lt{'button'}.</b>
1.105 www 962: </p>
963: <p><form action="$url" method="POST">
1.42 albertel 964: ENDNEWPROBLEM
1.85 albertel 965: if (defined($templatelist)) {
966: $request->print("<select name=\"template\">$templatelist</select>");
967: }
1.146 albertel 968: $request->print("<br /><input type=\"submit\" name=\"newfile\" value=\"".&mt('Create')." $extension\" />");
1.238 albertel 969: $request->print("</form></p>".&Apache::loncommon::end_page());
1.65 matthew 970: }
971: return '';
1.42 albertel 972: }
973:
1.41 albertel 974: sub handler {
1.145 albertel 975: #my $t0 = [&gettimeofday()];
976: my $request=$_[0];
1.223 albertel 977: $Apache::lonxml::request=$request;
1.204 albertel 978: $Apache::lonxml::debug=$env{'user.debug'};
979: $env{'request.uri'}=$request->uri;
1.180 albertel 980: &setuppermissions();
1.145 albertel 981: # some times multiple problemmodes are submitted, need to select
982: # the last one
1.204 albertel 983: if ( defined($env{'form.problemmode'}) && ref($env{'form.problemmode'}) ) {
984: my $mode=$env{'form.problemmode'}->[-1];
985: undef $env{'form.problemmode'};
986: $env{'form.problemmode'}=$mode;
1.145 albertel 987: }
1.193 albertel 988:
1.145 albertel 989: my $file=&Apache::lonnet::filelocation("",$request->uri);
990:
991: #check if we know where we are
1.204 albertel 992: if ($env{'request.course.fn'} && !&Apache::lonnet::symbread()) {
1.145 albertel 993: # if we are browsing we might not be able to know where we are
1.173 albertel 994: if ($Apache::lonhomework::browse ne 'F' &&
1.204 albertel 995: $env{'request.state'} ne "construct") {
1.145 albertel 996: #should know where we are, so ask
1.190 albertel 997: $request->internal_redirect('/adm/ambiguous'); return OK;
1.145 albertel 998: }
999: }
1.187 albertel 1000: if (&setupheader($request)) { return OK; }
1.244 albertel 1001: &Apache::lonxml::debug("Permissions:$Apache::lonhomework::browse:$Apache::lonhomework::viewgrades:$Apache::lonhomework::modifygrades:$Apache::lonhomework::queuegrade");
1.204 albertel 1002: &Apache::lonxml::debug("Problem Mode ".$env{'form.problemmode'});
1.145 albertel 1003: my ($symb) = &Apache::lonxml::whichuser();
1004: &Apache::lonxml::debug('symb is '.$symb);
1.204 albertel 1005: if ($env{'request.state'} eq "construct") {
1.145 albertel 1006: if ( -e $file ) {
1007: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1008: ['problemmode']);
1.204 albertel 1009: if (!(defined $env{'form.problemmode'})) {
1.145 albertel 1010: #first visit to problem in construction space
1.204 albertel 1011: $env{'form.problemmode'}='View';
1.145 albertel 1012: &renderpage($request,$file);
1.204 albertel 1013: } elsif ($env{'form.problemmode'} eq &mt('EditXML') ||
1014: $env{'form.problemmode'} eq 'EditXML') {
1.145 albertel 1015: &editxmlmode($request,$file);
1.204 albertel 1016: } elsif ($env{'form.problemmode'} eq &mt('Calculate answers')) {
1.145 albertel 1017: &analyze($request,$file);
1018: } else {
1019: &renderpage($request,$file);
1020: }
1021: } else {
1022: # requested file doesn't exist in contruction space
1023: &newproblem($request);
1024: }
1025: } else {
1026: # just render the page normally outside of construction space
1027: &Apache::lonxml::debug("not construct");
1.52 albertel 1028: &renderpage($request,$file);
1.41 albertel 1029: }
1.145 albertel 1030: #my $td=&tv_interval($t0);
1031: #&Apache::lonxml::debug("Spent $td seconds processing");
1032: # always turn off debug messages
1033: $Apache::lonxml::debug=0;
1034: return OK;
1.52 albertel 1035:
1.1 albertel 1036: }
1037:
1038: 1;
1039: __END__
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